Struct EventHash 

pub struct EventHash(/* private fields */);

A 20-byte hash identifying a KEL event.

Serializes as a 40-character lowercase hex string, matching the encoding used by git2::Oid::to_string(). This ensures JSON payloads, API schemas, and cache files remain compatible when migrating from git2::Oid.

Args

The inner [u8; 20] represents the raw SHA-1 bytes.

Usage

use auths_keri::witness::EventHash;

// From raw bytes
let bytes = [0u8; 20];
let hash = EventHash::from_bytes(bytes);
assert_eq!(hash.as_bytes(), &bytes);

// From hex string
let hash = EventHash::from_hex("0000000000000000000000000000000000000001").unwrap();
assert_eq!(hash.to_hex(), "0000000000000000000000000000000000000001");

// Serde: serializes as hex string, not integer array
let json = serde_json::to_string(&hash).unwrap();
assert_eq!(json, r#""0000000000000000000000000000000000000001""#);

Implementations

impl EventHash

pub const fn from_bytes(bytes: [u8; 20]) -> EventHash

Create an EventHash from raw bytes.

pub fn as_bytes(&self) -> &[u8; 20]

Get the raw bytes of this hash.

pub fn from_hex(s: &str) -> Option<EventHash>

Create an EventHash from a hex string.

Returns None if the string is not exactly 40 hex characters.

Example

use auths_keri::witness::EventHash;

let hash = EventHash::from_hex("0123456789abcdef0123456789abcdef01234567");
assert!(hash.is_some());

// Wrong length
assert!(EventHash::from_hex("0123").is_none());

// Invalid characters
assert!(EventHash::from_hex("zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz").is_none());

pub fn to_hex(&self) -> String

Convert this hash to a lowercase hex string.

Example

use auths_keri::witness::EventHash;

let hash = EventHash::from_bytes([0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                                  10, 11, 12, 13, 14, 15, 16, 17, 18, 19]);
assert_eq!(hash.to_hex(), "000102030405060708090a0b0c0d0e0f10111213");

Trait Implementations

impl Clone for EventHash

fn clone(&self) -> EventHash

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for EventHash

impl Debug for EventHash

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for EventHash

fn deserialize<D>( deserializer: D, ) -> Result<EventHash, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for EventHash

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Eq for EventHash

impl FromStr for EventHash

type Err = EventHashParseError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<EventHash, <EventHash as FromStr>::Err>

Parses a string s to return a value of this type.

impl Hash for EventHash

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for EventHash

fn eq(&self, other: &EventHash) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for EventHash

fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for EventHash